EP2596676B1 - Systèmes et procédés de coordination d'activité dans les terminaux multi-radio - Google Patents

Systèmes et procédés de coordination d'activité dans les terminaux multi-radio Download PDF

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Publication number
EP2596676B1
EP2596676B1 EP11809283.2A EP11809283A EP2596676B1 EP 2596676 B1 EP2596676 B1 EP 2596676B1 EP 11809283 A EP11809283 A EP 11809283A EP 2596676 B1 EP2596676 B1 EP 2596676B1
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European Patent Office
Prior art keywords
radio module
slots
communication device
clc
indicator
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EP11809283.2A
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German (de)
English (en)
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EP2596676A1 (fr
EP2596676A4 (fr
Inventor
Li-Chun Ko
Hong-Kai Hsu
I-Kang Fu
Chi-Chen Lee
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MediaTek Inc
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MediaTek Inc
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Priority claimed from US12/925,475 external-priority patent/US8626067B2/en
Application filed by MediaTek Inc filed Critical MediaTek Inc
Priority to EP17165619.2A priority Critical patent/EP3209084B1/fr
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Publication of EP2596676A4 publication Critical patent/EP2596676A4/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1215—Wireless traffic scheduling for collaboration of different radio technologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • the invention relates generally to coexisting designs of multiple radio modules in a wireless communication device, and more particularly to an activity coordination method for coordinating the operations of the multiple radio modules such that interference between the multiple radio modules may be efficiently reduced while saving power.
  • WiFi Wireless Fidelity
  • WiMAX Worldwide Interoperability for Microwave Access
  • Bluetooth is a wireless standard for Wireless Personal Area Networks (WPANs) developed by the BT special interest group (SIG). BT provides a secure way for exchanging data over short distances using frequency-hopping spread spectrum technology.
  • WiFi often operates at 2.412-2.4835GHz
  • WiMAX often operates at 2.3-2.4 or 2.496-2.690GHz
  • BT often operates at 2.402-2.480GHz.
  • a Multiple Radio Terminal may simultaneously include BT, WiMAX, and WiFi radios. Simultaneous operation of multiple radio modules co-located on the same physical device, however, can suffer from significant degradation including significant interference therebetween because of the overlapping or adjacent radio spectrums. Due to physical proximity and radio power leakage, when the data transmission of a first radio module overlaps with the data reception of a second radio module in the same time domain, the data reception of the second radio module can be hindered due to interference from the data transmission of the first radio module. Likewise, data transmission of the second radio module can interfere with data reception of the first radio module.
  • Fig. 1 is a schematic diagram illustrating interference between a Mobile Wireless System (MWS) radio module 11 and a BT master radio module 12 that are co-located in an MRT.
  • MWS Mobile Wireless System
  • Both of the MWS radio module 11 and the BT master radio module 12 transmit and receive data via scheduled transmitting (TX) and receiving (RX) time slots on a frame-by-frame basis. For example, in each MWS frame, the first five consecutive RX slots are scheduled for receiving operations and the three consecutive TX slots are scheduled for transmitting operations. Due to the fact that the MWS radio module 11 and the BT master radio module 12 are co-located within the MRT 10, the transmission of one radio module will generally interfere with the reception of another radio module. As shown in Fig.
  • Fig. 2 is a schematic diagram illustrating traffic patterns of a BT master radio module 22 affected by a co-located MWS radio module 21.
  • the BT master radio module 22 uses low transmission power, so that the data transmissions of the BT master radio module 22 does not interfere with the data receptions of the MWS radio module 21, but the data transmissions of the MWS radio module 21 interferes with the data receptions of the BT master radio module 22.
  • the EV3 data reception in the first scheduled EV3 RX time slot is corrupted by the concurrent data transmission of the MWS radio module 21, causing the BT master radio module 22 to re-transmit the EV3 data to a BT slave in the following EV3 TX time slot and to receive EV3 data from the BT slave in the following EV3 RX time slot.
  • the BT master radio module 22 needs to consume 25% more power due to interference from the co-located MWS radio module 21.
  • the invention suggests a wireless communication device with the features of claim 1 and an activity coordination method for such a wireless communication device comprising a plurality of co-located radio modules with the features of claim 11.
  • One aspect of the invention discloses a wireless communication device comprising a first radio module and a second radio module.
  • the first radio module performs wireless transceiving in compliance with a first communication protocol and according to a plurality of first traffic patterns which each indicates allocations of a plurality of first slots for a plurality of forthcoming transmitting or receiving operations, respectively.
  • the second radio module performs wireless transceiving in compliance with a second communication protocol, and determines an indicator indicating at least one of a plurality of second traffic patterns which each indicates allocations of a plurality of second slots for a plurality of forthcoming transmitting or receiving operations, respectively, wherein one or more allocations of the second slots are selectively determined according to the first traffic patterns, prior to the determining of the indicator.
  • the second radio module transmits the indicator to a peer communication device, so that the peer communication device performs transmitting or receiving operations to and from the second radio module according to the at least one of the second traffic patterns indicated by the indicator.
  • the activity coordination comprises the steps of: providing a first radio module for performing wireless transceiving in compliance with a first communication protocol and according to a plurality of first traffic patterns which each indicates allocations of a plurality of first slots for a plurality of forthcoming transmitting or receiving operations, respectively; providing a second radio module for performing wireless transceiving in compliance with a second communication protocol; determining, by the second radio module, an indicator indicating at least one of a plurality of second traffic patterns which each indicates allocations of a plurality of second slots for a plurality of forthcoming transmitting or receiving operations, respectively, wherein one or more allocations of the second slots are selectively determined according to the first traffic patterns; and transmitting, by the second radio module, the indicator to a peer communication device, so that the peer communication device performs transmitting or receiving operations to and from the second radio module according to the at least one of the second traffic patterns indicated by the indicator.
  • Fig. 3 is a block diagram illustrating a Multi-Ratio Terminal (MRT) 32 in a wireless communication system 30 according to an embodiment of the invention.
  • the wireless communication system 30 comprises an access node 31, an MRT 32, and a Bluetooth (BT) headset 33.
  • the MRT 32 includes a first radio module, e.g., a Mobile Wireless System (MWS) radio module 45, and a second radio module, e.g., a BT radio module 46.
  • the MRT 32 communicates with the access node 31 using the MWS radio module 45, and communicates with the BT headset 33 using the BT radio module 46.
  • the MWS radio module 45 comprises a transceiver 41 and an MWS controller 42.
  • the BT radio module 46 comprises a transceiver 43 and a BT controller 44.
  • the MWS controller 42 and the BT controller 44 may communicate with each other via a coexistence-signaling interface 49.
  • the Coexistence-signaling interface 49 is also connected to a processor 47 and a memory 48 of the MRT 32.
  • the coexistence signaling interface 49 is denoted as one module, it may include both hardware and software implementations of multiple functional components, such as the hardware implementation of functional component(s) for timing/synchronization controls between the MWS radio module 45 and the BT radio module 46, and the software implementation of functional component(s) for traffic information exchange between the MWS radio module 45 and the BT radio module 46, etc., and the invention is not limited thereto.
  • the MWS radio module 45 is a WiMAX radio module that operates at 2.3-2.4 or 2.496-2.690GHz, while the BT radio module 46 operates at 2.402-2.480GHz.
  • the MWS radio module 45 is a WiFi radio module that operates at 2.412-2.4835GHz, while the BT radio module 46 operates at 2.402-2.480GHz. Simultaneous operation of multiple radio modules co-located in the same wireless communication device may suffer significant degradation including significant interference therebetween because of the overlapping or adjacent radio spectrums. This is especially true when both of the MWS radio module 45 and the BT radio module 46 use the time division multiplexing (TDM) protocol for data communications.
  • TDM time division multiplexing
  • the invention proposes an activity coordination method for coordinating the operations of the multiple radio modules such that interference between the multiple radio modules may be greatly reduced.
  • Fig. 4 is a schematic diagram illustrating the BT radio module 46 selectively skipping scheduled time slots according to an embodiment of the invention.
  • the MWS radio module 45 has a typical MWS traffic pattern in which each MWS frame contains eight time slots including five consecutive RX slots followed by three consecutive TX slots.
  • the BT radio module 46 is a BT master using the Time Division Duplex (TDD) scheme to communicate with a BT slave and it has an Asynchronous Connection-Oriented (ACL) traffic pattern, wherein the BT radio module 46 alternates TX and RX operations.
  • the BT radio module 46 first aligns its communication slots with the MWS radio module 45. Specifically, the start of a packet should be aligned with the start of a slot.
  • the BT radio module 46 then obtains the traffic pattern of the MWS radio module 45 via the coexistence-signaling interface 49.
  • the BT radio module 46 Based on the obtained traffic pattern, the BT radio module 46 deliberately gives up certain scheduled TX and RX slots (denoted with a thick-lined box) that will be affected by the co-located MWS radio module 45 to save power, since the data reception in the thick-lined box is estimated to be unsuccessful due to the interference from the data transmission of the MWS radio module 45. Also, the BT radio module 46 generates RX/TX Co-Located Coexistence (CLC) bitmaps according to the traffic pattern of the MWS radio module 45, and negotiates with the BT headset 33 for the RX/TX CLC bitmap so that the BT headset 33 may obtain the RX/TX CLC bitmap and also skip data transmission or reception in certain time slots affected by the MWS radio module 45. During the skipped time slots, TX or RX operation is given up by disabling or turning off the transceiver 46 to save power consumption.
  • CLC Co-Located Coexistence
  • the BT radio module 46 may selectively give up one or more scheduled TX slots if a corresponding acknowledgement of the transmitted data is estimated to not have been received successfully due to interference from the co-located MWS radio module 45, and similarly, the BT headset 33 may selectively give up one or more scheduled TX slots if it is estimated that the data to be transmitted would not be received by its peer BT device successfully. In another embodiment, the BT radio module 46 may selectively give up one or more scheduled TX slots if it is estimated that data transmission in the TX slots would interfere with data reception of the co-located MWS radio module 45.
  • the BT radio module 46 may selectively give up one or more scheduled RX slots if the receiving operation is affected by interference from the co-located MWS radio module 45, and similarly, the BT headset 33 may selectively give up one or more scheduled RX slots if it is estimated that its peer BT device will not transmit data in the RX slots.
  • Fig. 5 is a block diagram illustrating an exemplary generation of RX/TX CLC bitmaps according to the embodiment of Fig. 4 .
  • the data transmission of the BT radio module 46 does not interfere with the data reception of the MWS radio module 45, due to the fact that the BT radio module 46 operates in a hybrid mode in which relatively low transmission power is used or the MWS radio module 45 and the BT radio module 46 are equipped with an RX filter and a TX filter, respectively, to resist mutual interference.
  • each MWS frame is 5 milliseconds in length and contains eight time slots including five RX slots followed by three TX slots.
  • Each BT slot is 625 microseconds in length.
  • the MWS frames are aligned with BT slots in the time domain. Since every 24 BT slots are aligned with three MWS frames and the traffic pattern of the MWS radio module repeats for every frame, a 24-bits RX CLC bitmap and a 24-bits TX CLC bitmap are generated to represent the allocations of 24 forthcoming BT slots for possible data transmission or reception. However, the length of the TX/RX CLC bitmap is variable. If the data transmission of the MWS radio module 45 is estimated to interfere with the data reception of the BT radio module 46, the BT radio module 46 does not schedule data reception in any of the MWS TX slots.
  • a BT RX CLC bitmap 51 is generated to indicate whether each of the 24 forthcoming BT slots may be used for receiving operations, wherein a "1" bit indicates availability for data reception and a "0" bit indicates unavailability for data reception.
  • a BT TX CLC bitmap 52 is generated to indicate whether each of the 24 forthcoming BT slots may be used for transmitting operations, which contains only "1" bit, for indicating availability for data transmission in all BT slots.
  • Fig. 6 is a block diagram illustrating an exemplary generation of RX/TX CLC bitmaps according to another embodiment of the invention.
  • the MWS frames and traffic patterns in Fig. 6 is the same as the MWS frames and traffic patterns illustrated in Fig. 5 .
  • neither the BT radio module 46 operates in a hybrid mode in which relatively low transmission power is used, nor the MWS radio module 45 and the BT radio module 46 are equipped with an RX filter and a TX filter, respectively, to resist mutual interference.
  • the data transmission of the BT radio module 46 interferes with the data reception of the MWS radio module 45.
  • the BT RX CLC bitmap 61 in Fig. 6 is the same as the BT RX CLC bitmap 51 in Fig.
  • the BT TX CLC bitmap 62 is generated to indicate whether each of the 24 forthcoming BT slots may be used for transmitting operations, wherein a "1" bit indicates availability for data transmission and a "0" bit indicates unavailability for data transmission.
  • Fig. 7 is a block diagram illustrating an exemplary generation of RX/TX CLC bitmaps according to yet another embodiment of the invention.
  • the operation status of the MWS radio module 45 is configured to be inactive, and thus, no transmitting and receiving operations are to be performed. Accordingly, a BT RX CLC bitmap 71 containing only "1" bit is generated to indicate availability for data receptions in all BT slots; and a BT TX CLC bitmap 72 containing only "1" bit is generated to indicate availability for data transmissions in all BT slots.
  • the RX/TX CLC bitmaps may be negotiated to the BT headset 33, together with a set index, an offset parameter D CLC , and an interval parameter T CLC , via a Link Manager Protocol (LMP) message (e.g., LMP_CLC_BITMAP_CONFIG), wherein the set index is an identification indicator for the transmitting RX/TX CLC bitmaps, the offset parameter D CLC indicates the time offset from now to the time when the RX/TX CLC bitmaps are to be applied, and the interval parameter T CLC indicates the length of time for using the RX/TX CLC bitmaps.
  • LMP message may further comprise an initialization flag for preventing clock wrap-around problems.
  • a "0" bit is set for the initialization flag when the Most Significant Bit (MSB) of the current master clock is 0, to indicate that an initialization procedure 1 should be used to prevent clock wrap-around problems
  • a "1" bit is set for the initialization flag when the Most Significant Bit (MSB) of the current master clock is 1, to indicate that an initialization procedure 2 should be used to prevent clock wrap-around problems.
  • the BT radio module 46 may further inform the BT headset 33 about which of the negotiated CLC bitmaps sets to be used in a forthcoming period of time, via another Link Manager Protocol (LMP) message (e.g., LMP_CLC_BITMAP_REQ).
  • LMP Link Manager Protocol
  • Fig. 8 is a message sequence chart illustrating negotiation of RX/TX CLC bitmaps according to an embodiment of the invention.
  • the MWS radio module 45 and the BT radio module 46 are both switched off. Later, when the MWS radio module 45 and the BT radio module 46 are switched on, the MWS radio module 45 determines its traffic patterns, including the traffic patterns for the active state and inactive state, and then transmits a notification signal to the BT radio module 46 to indicate the operation status change in a forthcoming period of time (step S801). In response to the notification signal, the BT radio module 46 obtains the traffic patterns of the MWS radio module 45 via the coexistence-signaling interface 49.
  • the BT radio module 46 Based on the obtained traffic patterns, the BT radio module 46 generates two sets of RX/TX CLC bitmaps for the co-located MWS radio module 45 being in active and inactive states (denoted as RX/TX CLC bitmaps set#1 and set#2, respectively) according to scheduled allocations of slots for the forthcoming transmitting or receiving operations, and then starts negotiating the RX/TX CLC bitmaps sets with the BT headset 33.
  • the BT radio module 46 first transmits the RX/TX CLC bitmaps set for active MWS radio module 45, i.e., the RX/TX CLC bitmaps set#1, to the BT headset 33 via an LMP message (e.g., LMP_CLC_BITMAP_CONFIG) (step S802).
  • the LMP message may further comprise other related information, such as the index of the RX/TX CLC bitmaps set, an offset parameter D CLC , an interval parameter T CLC , and an initialization flag as mentioned above.
  • the BT headset 33 replies to the BT radio module 46 with an LMP response message (e.g., LMP_ACCEPTED) (step S803).
  • the BT headset 33 may reply to the BT radio module 46 with another LMP message containing adjusted RX/TX CLC bitmaps.
  • the BT radio module 46 transmits the RX/TX CLC bitmaps set for inactive MWS radio module 45, i.e., the RX/TX CLC bitmaps set#2, to the BT headset 33 via an LMP message (e.g., LMP_CLC_BITMAP_CONFIG) (step S804).
  • LMP message e.g., LMP_CLC_BITMAP_CONFIG
  • the BT headset 33 replies to the BT radio module 46 with an LMP response message (e.g., LMP_ACCEPTED) (step S805).
  • LMP_ACCEPTED LMP response message
  • the steps of negotiations may be repeated, if there are more than two RX/TX CLC bitmaps sets, until all RX/TX CLC bitmaps sets are negotiated between the BT radio module 46 and the BT headset 33.
  • the BT radio module 46 selects the RX/TX CLC bitmaps set#1 (e.g., the RX/TX CLC bitmaps as shown in Fig.
  • the BT headset 33 informs the BT headset 33 about the set index of RX/TX CLC bitmaps via another LMP message (e.g., LMP_CLC_BITMAP_REQ) (step S806).
  • LMP_CLC_BITMAP_REQ LMP_CLC_BITMAP_REQ
  • the BT headset 33 replies to the BT radio module 46 with an acknowledgement via another LMP response message (e.g., LMP_ACCEPTED) (step S807), and then uses the RX/TX CLC bitmaps set#1, for performing transmitting and/or receiving operations.
  • the BT radio module 46 correspondingly uses the RX/TX CLC bitmaps set#1 for performing transmitting and/or receiving operations.
  • the MWS radio module 45 detects that its operation status is about to change from active to inactive, it transmits another notification signal to the BT radio module 46 to indicate the operation status change in another forthcoming period of time (step S808).
  • the BT radio module 46 informs the BT headset 33 about the set index of RX/TX CLC bitmaps via another LMP message (e.g., LMP_CLC_BITMAP_REQ) (step S809).
  • the BT headset 33 When receiving the LMP message, the BT headset 33 replies to the BT radio module 46 with an acknowledgement via another LMP response message (e.g., LMP_ACCEPTED) (step S810), and then uses the RX/TX CLC bitmaps set#2, for performing transmitting and/or receiving operations.
  • the BT radio module 46 correspondingly uses the RX/TX CLC bitmaps set#2 for performing transmitting and/or receiving operations. Note that, if the traffic patterns of the MWS radio module 45 changes after the negotiation steps S820 ⁇ S850, another negotiation of RX/TX CLC bitmaps sets may be initiated to update the RX/TX CLC bitmaps sets between the BT radio module 46 and the BT headset 33.
  • Fig. 9 is a block diagram illustrating detection of operation status changes of the MWS radio module 45 according to an embodiment of the invention.
  • frame synchronization is performed first, so that the MWS frames are aligned with BT slots in the time domain, and negotiation of RX/TX CLC bitmaps sets is also performed, so that the RX/TX CLC bitmaps sets in the BT radio module 46 and the BT headset 33 are in-sync.
  • frame synchronization is performed first, so that the MWS frames are aligned with BT slots in the time domain, and negotiation of RX/TX CLC bitmaps sets is also performed, so that the RX/TX CLC bitmaps sets in the BT radio module 46 and the BT headset 33 are in-sync.
  • the MWS radio module 45 detects that the current activities, e.g., transmitting operations and/or receiving operations, are about to stop at time t3 for a period of time N, i.e., its operation status is about to change from active to inactive at time t3 for the period of time N. Specifically, the MWS radio module 45 may periodically perform the early detection to see if the current activities are about to stop after a predetermined period of time. Also, at time t1 , the MWS radio module 45 transmits a notification signal to the BT radio module 46 to indicate the operation status change of the MWS radio module 45 in a forthcoming period of time.
  • the current activities e.g., transmitting operations and/or receiving operations
  • the BT radio module 46 determines an indicator indicating at least one of the BT TX and RX CLC bitmaps sets (referred to herein as BT CLC bitmaps sets) which were previously negotiated to the BT headset 33, e.g., the RX/TX CLC bitmaps set#2, according to the to-be-changed operation status of the MWS radio module 45, and then transmits the indicator to the BT headset 33 at time t2 .
  • the BT headset 33 replies to the BT radio module 46 with an acknowledgement of the indicator, and then switches the currently used BT CLC bitmaps set to the BT CLC bitmaps set indicated by the indicator.
  • the BT radio module 46 When receiving the acknowledgement at time t3, the BT radio module 46 correspondingly switches the currently used BT CLC bitmaps set to the BT CLC bitmaps set indicated by the indicator. Similarly, when the MWS radio module 45 detects that the current activities are about to recover at time t6, it transmits another notification signal to the BT radio module 46, at time t4 , to indicate its operation status change in a forthcoming period of time.
  • the BT radio module 46 determines an indicator indicating at least one of the BT TX and RX CLC bitmaps sets (referred to herein as BT CLC bitmaps sets) which were previously negotiated to the BT headset 33, e.g., the RX/TX CLC bitmaps set#1 according to the to-be-changed operation status of the MWS radio module 45, and then transmits the indicator to the BT headset 33 at time t5.
  • BT CLC bitmaps sets referred to herein as BT CLC bitmaps sets
  • the BT headset 33 When receiving the indicator, the BT headset 33 replies to the BT radio module 46 with an acknowledgement of the indicator, and when the BT radio module 46 receives the acknowledgement at time t6 , it correspondingly switches the currently used BT CLC bitmaps set to the BT CLC bitmaps set indicated by the indicator.
  • the switching overhead of the used BT CLC bitmaps set may be minimized, and the schedule of the activities of the BT radio module 46 may be adjusted accordingly.
  • the BT CLC bitmaps set used by the BT radio module 46 before time t3, e.g., the RX/TX CLC bitmaps set#1, indicates restricted TX/RX access
  • the BT CLC bitmaps set used by the BT radio module 46 during time t3 and t6 e.g., the RX/TX CLC bitmaps set#2
  • the BT radio module 46 may selectively cancel or add one or more of the allocations of the slots for transmitting and/or receiving operations to prevent mutual interference from/to the MWS radio module 45, and during time t3 and t6 , the BT radio module 46 may freely use the allocations of the slots for transmitting and/or receiving operations since no mutual interference may be occurred from/to the MWS radio module 45.
  • Fig. 10 is a message sequence chart illustrating fast activation of RX/TX CLC bitmaps according to an embodiment of the invention. Similar to Fig. 8 , the MWS radio module 45 and the BT radio module 46 are both initially switched off. Later, when the MWS radio module 45 and the BT radio module 46 are switched on, the MWS radio module 45 determines its traffic patterns, including the traffic patterns for the active state and inactive state, and then transmits a notification signal to the BT radio module 46 to indicate the operation status change in a forthcoming period of time (step S1001). In response to the notification signal, the BT radio module 46 obtains the traffic patterns of the MWS radio module 45 via the coexistence-signaling interface 49.
  • the BT radio module 46 Based on the obtained traffic patterns, the BT radio module 46 generates two sets of RX/TX CLC bitmaps for the co-located MWS radio module 45 being in active and inactive states (denoted as RX/TX CLC bitmaps set#1 and set#2, respectively) according to scheduled allocations of slots for the forthcoming transmitting or receiving operations, and then starts negotiating the RX/TX CLC bitmaps sets with the BT headset 33.
  • the BT radio module 46 first transmits the RX/TX CLC bitmaps set for active MWS radio module 45, i.e., the RX/TX CLC bitmaps set#1, to the BT headset 33 via an LMP message (e.g., LMP_CLC_BITMAP_CONFIG) (step S1002).
  • LMP message may further comprise other related information, such as the index of the RX/TX CLC bitmaps set, an offset parameter D CLC , an interval parameter T CLC , and an initialization flag as mentioned above.
  • the BT headset 33 determines that the RX/TX CLC bitmaps set contained in the LMP message is not acceptable, and adjusts the RX/TX CLC bitmaps set.
  • the BT headset 33 transmits the adjusted RX/TX CLC bitmaps set to the BT radio module 46 via an LMP message (e.g., LMP_CLC_BITMAP_CONFIG) (step S1003).
  • LMP_CLC_BITMAP_CONFIG LMP_CLC_BITMAP_CONFIG
  • the BT radio module 46 further transmits the RX/TX CLC bitmaps set for inactive MWS radio module 45, i.e., the RX/TX CLC bitmaps set#2, to the BT headset 33 via an LMP message (e.g., LMP_CLC_BITMAP_CONFIG) (step S1005).
  • LMP_CLC_BITMAP_CONFIG LMP message
  • the BT headset 33 replies to the BT radio module 46 with an LMP response message (e.g., LMP_ACCEPTED) in response to determining that the RX/TX CLC bitmaps set is acceptable (step S1006).
  • the steps of negotiations may be repeated, if there are more than two RX/TX CLC bitmaps sets, until all RX/TX CLC bitmaps sets are negotiated between the BT radio module 46 and the BT headset 33.
  • the BT radio module 46 After the RX/TX CLC bitmaps set#1 and set#2 have been successfully negotiated between the BT radio module 46 and the BT headset 33, the BT radio module 46 subsequently informs the BT headset 33 for fast activation of a certain set of the previously negotiated RX/TX CLC bitmaps, via Media Access Control (MAC) header signaling. Specifically, the BT radio module 46 selects the RX/TX CLC bitmaps set#1 (e.g., the RX/TX CLC bitmaps as shown in Fig.
  • MAC Media Access Control
  • step S1007 When receiving the TX data from the BT radio module 46, the BT headset 33 replies to the BT radio module 46 with an acknowledgement of the TX data, and starts to use the RX/TX CLC bitmaps set#1. When receiving the acknowledgement, the BT radio module 46 correspondingly starts to use the RX/TX CLC bitmaps set#1as well (step S1008).
  • the MWS radio module 45 detects that its operation status is about to change from active to inactive, it transmits a notification signal to the BT radio module 46 to indicate the operation status change in a forthcoming period of time (step S1009).
  • the BT radio module 46 performs another transmitting operation with a data header comprising an indicator for RX/TX CLC bitmaps set#2 (step S1010).
  • the BT headset 33 replies to the BT radio module 46 with an acknowledgement of the TX data, and switches the currently used RX/TX CLC bitmaps set from set#1 to set#2.
  • the BT radio module 46 also switches the currently used RX/TX CLC bitmaps set from set#1 to set#2 when receiving the acknowledgement (step S1011).
  • the RX/TX CLC bitmap set may be predetermined in the BT radio module 46 and the BT headset 33, so that the negotiation of RX/TX CLC bitmaps in Fig. 8 may be skipped and only fast activation of RX/TX CLC bitmaps (i.e., the steps S1010 to S1030) is required to be performed for switching the currently used RX/TX CLC bitmaps between the BT radio module 46 and the BT headset 33.
  • the third RX/TX CLC bitmap set corresponds to an untypical-active operation status of the MWS radio module 45, in which each MWS frame in the traffic pattern of the MWS radio module 45 contains eight time slots including 4 consecutive TX slots followed by 4 consecutive RX slots; and the invention is not limited thereto.
  • RX/TX CLC bitmaps may be transmitted to the BT slave device to reduce the number of LMP message transmissions and receptions, for the case where the traffic pattern of the MWS radio module 45 rarely changes.
  • 4 sets of RX/TX CLC bitmaps may be transmitted to the BT slave device via an LMP message.
  • the determined indicator as illustrated in Fig. 10 may be used to identify the combination of the 4 sets of RX/TX CLC bitmaps to be used upon the operation status change of the MWS radio module 45.
  • a first combination contains 2 RX/TX CLC bitmap set #1, 1 RX/TX CLC bitmap set #2, and 1 RX/TX CLC bitmap set #3
  • a second combination contains 1 RX/TX CLC bitmap set #1, 2 RX/TX CLC bitmap set #2, and 1 RX/TX CLC bitmap set #3, etc.
  • Fig. 11 is a flow chart illustrating an activity coordination method according to an embodiment of the invention.
  • the activity coordination method may be applied in any wireless communication device comprising a plurality of co-located radio modules, i.e., any multi-radio terminals, such as the MRT 32, for coordinating the operations of the multiple radio modules such that some transmitting and/or receiving operations of a radio module may be selectively skipped to prevent mutual interference between the multiple radio modules and to save power.
  • a first radio module is provided for performing wireless transceiving in compliance with a first communication protocol and according to a plurality of first traffic patterns which each indicates allocations of a plurality of first slots for a plurality of forthcoming transmitting or receiving operations, respectively (step S1110), and a second radio module is provided for performing wireless transceiving in compliance with a second communication protocol (step S1120).
  • the first radio module may refer to the MWS radio module 45 and the second radio module may refer to the BT radio module 46.
  • the MWS radio module 45 may be a WiMAX radio module that operates at 2.3-2.4 or 2.496-2.690GHz, while the BT radio module 46 operates at 2.402-2.480GHz.
  • the MWS radio module 45 may be a WiFi radio module that operates at 2.412-2.4835GHz.
  • the second radio module determines an indicator indicating at least one of a plurality of second traffic patterns which each indicates allocations of a plurality of second slots for a plurality of forthcoming transmitting or receiving operations, respectively (step S1130).
  • the second slots are aligned with the first slots, and one or more allocations of the second slots are selectively determined for cancellation or addition according to the first traffic patterns.
  • one of the first traffic patterns may refer to the WiMAX traffic pattern in which each MWS frame contains eight time slots including five RX slots followed by three TX slots
  • the second traffic patterns corresponding to the concurrent time slots may refer to the RX CLC bitmap 61 and the TX CLC bitmap 62, wherein the first RX slot in the RX CLC bitmap 61 and the TX slots in the TX CLC bitmap 62 are deliberately given up to prevent mutual interference between the first radio module and the second radio module.
  • the second radio module transmits the indicator to a peer communication device, so that the peer communication device performs transmitting or receiving operations to and from the second radio module according to the at least one of the second traffic patterns indicated by the indicator (step S1140).
  • the indicator may be transmitted via a MAC data header in the transmitted data of the second radio module.
  • the peer communication device may further reply to the second radio module with an acknowledgement for acknowledging the reception of the transmitting data, and the indicator is used for selecting at least one of the second traffic patterns when the acknowledgment is replied to.
  • the second radio module also performs transmitting or receiving operations to and from the peer communication device according to the at least one of the second traffic patterns indicated by the indicator, when receiving the acknowledgement.
  • the first traffic patterns and the second traffic patterns may be pre-negotiated from the second radio module to the peer communication device, before the activity coordination method is applied, as described in the embodiment of Fig. 10 .
  • the first traffic patterns and the second traffic patterns may be predetermined in the second radio module and the peer communication device, so that no negotiation of the first and second traffic patterns is required.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Claims (9)

  1. Dispositif de communication sans fil (32), comprenant :
    un premier module radio (45), adapté pour effectuer une émission-réception sans fil conformément à un premier protocole de communication et selon une pluralité de premiers schémas de trafic qui indiquent chacun des attributions d'une pluralité de premiers créneaux pour une pluralité de prochaines opérations de transmission ou de réception, respectivement ;
    le dispositif de communication sans fil (32) comprenant en outre :
    un deuxième module radio (46), adapté pour effectuer une émission-réception sans fil conformément à un deuxième protocole de communication, adapté pour déterminer un indicateur indiquant au moins l'un d'une pluralité de deuxièmes schémas de trafic qui indiquent chacun des attributions d'une pluralité de deuxièmes créneaux pour une pluralité de prochaines opérations de transmission ou de réception, respectivement, et adapté pour transmettre l'indicateur à un dispositif de communication pair (33), de telle sorte que le dispositif de communication pair (33) réalise des opérations de transmission ou de réception vers et depuis le deuxième module radio (46) selon l'au moins un des deuxièmes schémas de trafic indiqués par l'indicateur,
    dans lequel il est en outre adapté pour déterminer une ou plusieurs attributions des deuxièmes créneaux selon les premiers schémas de trafic, avant la détermination de l'indicateur, et
    dans lequel tous les schémas de la pluralité de deuxièmes schémas de trafic sont négociés entre le deuxième module radio (46) et le dispositif de communication pair (33) avant la réalisation des opérations d'émission-réception sans fil.
  2. Dispositif de communication sans fil (32) selon la revendication 1, dans lequel le deuxième module radio (46) est en outre adapté pour réaliser des opérations de transmission ou de réception vers et depuis le dispositif de communication pair (33) selon l'au moins un des deuxièmes schémas de trafic indiqués par l'indicateur.
  3. Dispositif de communication sans fil (32) selon la revendication 1, comprenant un moyen adapté pour annuler la ou les attributions des deuxièmes créneaux quand on estime que les opérations de réception dans les deuxièmes créneaux correspondants subissent une interférence par les opérations de transmission du premier module radio (45) .
  4. Dispositif de communication sans fil (32) selon la revendication 1, comprenant un moyen adapté pour annuler la ou les attributions des deuxièmes créneaux quand on estime que les transmissions de données dans les deuxièmes créneaux correspondants interfèrent avec les opérations de réception du premier module radio (45).
  5. Dispositif de communication sans fil (32) selon la revendication 1, comprenant un moyen adapté pour annuler la ou les attributions des deuxièmes créneaux quand on estime que des accusés de réception de transmissions de données dans les deuxièmes créneaux correspondants n'ont pas été reçus avec succès en raison d'une interférence provenant du premier module radio (45).
  6. Dispositif de communication sans fil (32) selon la revendication 1, comprenant un moyen adapté pour déterminer l'indicateur selon un état de fonctionnement du premier module radio (45).
  7. Dispositif de communication sans fil (32) selon la revendication 6, dans lequel la détermination de l'indicateur et l'émission-réception sans fil sont réalisées par le deuxième module radio (46) en réponse à un changement de l'état de fonctionnement du premier module radio (45).
  8. Dispositif de communication sans fil (32) selon la revendication 6, dans lequel le premier module radio (45) est adapté pour générer un signal de notification indiquant un changement de l'état de fonctionnement dans une prochaine période de temps, et la détermination de l'indicateur et l'émission-réception sans fil sont réalisées par le deuxième module radio (46) en réponse au signal de notification et du changement de l'état de fonctionnement, respectivement.
  9. Procédé de coordination d'activité pour un dispositif de communication sans fil (32) comprenant une pluralité de modules radio co-localisés, comprenant :
    la fourniture d'un premier module radio (45) pour réaliser une émission-réception sans fil conformément à un premier protocole de communication et selon une pluralité de premiers schémas de trafic qui indiquent chacun des attributions d'une pluralité de premiers créneaux pour une pluralité de prochaines opérations de transmission ou de réception, respectivement, le procédé de coordination d'activité comprenant en outre :
    la fourniture d'un deuxième module radio (46) pour réaliser une émission-réception sans fil conformément à un deuxième protocole de communication ;
    la détermination, par le deuxième module radio (46), d'un indicateur indiquant au moins l'un d'une pluralité de deuxièmes schémas de trafic qui indiquent chacun des attributions d'une pluralité de deuxièmes créneaux pour une pluralité de prochaines opérations de transmission ou de réception, respectivement,
    dans lequel une ou plusieurs attributions des deuxièmes créneaux sont sélectivement déterminées selon les premiers schémas de trafic ; et
    la transmission, par le deuxième module radio (46), de l'indicateur à un dispositif de communication pair (33), de telle sorte que le dispositif de communication pair (33) réalise des opérations de transmission ou de réception vers et depuis le deuxième module radio (46) selon l'au moins un des deuxièmes schémas de trafic indiqués par l'indicateur,
    dans lequel tous les schémas de la pluralité de deuxièmes schémas de trafic sont négociés entre le deuxième module radio (46) et le dispositif de communication pair (33) avant la réalisation des opérations d'émission-réception sans fil.
EP11809283.2A 2010-07-20 2011-07-20 Systèmes et procédés de coordination d'activité dans les terminaux multi-radio Active EP2596676B1 (fr)

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US12/925,475 US8626067B2 (en) 2009-10-26 2010-10-22 System and methods for enhancing coexistence efficiency for multi-radio terminals
PCT/CN2011/077397 WO2012010095A1 (fr) 2010-07-20 2011-07-20 Systèmes et procédés de coordination d'activité dans les terminaux multi-radio

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US20180255548A1 (en) * 2017-03-06 2018-09-06 Mediatek Inc. Method of Reallocating Transmission Periods for Coexisting Wireless Modules
CN110798893A (zh) * 2019-09-26 2020-02-14 华为技术有限公司 一种解决共存干扰的方法及电子设备

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US8228922B2 (en) * 2006-12-29 2012-07-24 Nokia Corporation Multiradio synchronization and scheduling control
US7725118B2 (en) * 2007-08-22 2010-05-25 Intel Corporation Multi-radio wireless communication device and method for coordinating communications between potentially interfering radios
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US8730853B2 (en) * 2008-09-05 2014-05-20 Mediatek Inc. Methods for responding to co-located coexistence (CLC) request from a mobile electronic device and communications apparatuses capable of controlling multi-radio coexistence
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EP2596676A4 (fr) 2015-03-11
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EP3209084A1 (fr) 2017-08-23
CN103004283B (zh) 2016-05-25
EP3209084B1 (fr) 2018-10-31

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